I have already described the use of Lumia Software Recovery Tool (LSRT) in this older post. However Microsoft recently updated LSRT to a new software called “Windows Device Recovery Tool” (WDRT). It supports all old Nokia Lumia phones (WP 7/7.5/7.8/8/8.1) plus new Microsoft Lumia (WP 8/8.1 and Windows 10) devices. Despite the name change, WDRT essentially serves the same purpose as LSRT i.e. it can reset/restore/update a Lumia phone. Besides it can also be used to recover/flash a soft-bricked WP/Lumia device – a procedure commonly called “dead-phone USB flashing”. In WDRT Microsoft has also added support for Windows Phone devices manufactured by other companies like Acer, HTC, LG etc. But unlike LSRT, it does not support any old Nokia/Symbian/S40 phone other than Lumias. So without further blah-blah here is how you can use WDRT to recover/reset/flash/update a Lumia device.
